well the knob on an astrocade gunstock is not a spinner, IIRC... it had a potentiometer-like feel, and full stops on the left and right, it didn't rotate 360 degrees....Thats one of my favorite controller designs ever. ColecoVision baseball controllers were very similar and I loved those too. I might look into atari 2600 emulation to see how the paddle control is used in that respect and go from there, as I think the input mapping would be very similar.